I am very freaky about noises and my car so I noticed a sqeaking noise the other day.

1) It happens from start-up until i shut it off, warm or cold.
2) I had an underdrive pully on at one time (if thats important)
3) I took off the pully and went back with stock and got a new belt and had to replace the A/C compressor pully and clutch assembly (dont buy pullies off ebay)

So now I have a new belt new a/c drive and the stock pully and now it has started sqeaking all of a sudden. The sqeaking noise gets "faster" as I accelerate and is getting more frequent everyday.

I talked to a friend of mine who had a 2.4L Grand Am and it made the SAME noise.

Anyway, I was wondering if anyone had any ideas as to what the noise is? And if this is a common problem on 2.4L engines?
Sorry it's so long, just wanted to be detailed. Thanx